feat: add isUnorderedDragTarget

Author: lukasbach

.changeset/mighty-impalas-reflect.md

@@ -0,0 +1,5 @@
+---
+"@headless-tree/core": patch
+---
+
+Added `isUnorderedDragTarget` as alternative to `isDragTarget` for easier detection of drag type

packages/core/src/features/drag-and-drop/feature.ts

@@ -332,6 +332,13 @@ export const dragAndDropFeature: FeatureImplementation = {
       return target ? target.item.getId() === item.getId() : false;
     },
 
+    isUnorderedDragTarget: ({ tree, item }) => {
+      const target = tree.getDragTarget();
+      return target
+        ? !isOrderedDragTarget(target) && target.item.getId() === item.getId()
+        : false;
+    },
+
     isDragTargetAbove: ({ tree, item }) => {
       const target = tree.getDragTarget();
 

packages/core/src/features/drag-and-drop/types.ts

@@ -108,7 +108,13 @@ export type DragAndDropFeatureDef<T> = {
     ) => Record<string, any>;
   };
   itemInstance: {
+    /** Checks if the user is dragging in a way which makes this the new parent of the dragged items, either by dragging on top of
+     * this item, or by dragging inbetween children of this item. See @{isUnorderedDragTarget} if the latter is undesirable. */
     isDragTarget: () => boolean;
+
+    /** As opposed to @{isDragTarget}, this will not be true if the target is inbetween children of this item. This returns only true
+     * if the user is dragging directly on top of this item. */
+    isUnorderedDragTarget: () => boolean;
     isDragTargetAbove: () => boolean;
     isDragTargetBelow: () => boolean;
     isDraggingOver: () => boolean;